The Smartswitch(TM) system can be used to operate turnouts, semaphore signals, level crossing gates and barriers and other moving features. This set contains 4 Servos, operating wires, mounting brackets and switches plus a Smartswitch Control Board, Programming Board and also the all important Instruction Manual. Watch the videos to see the potential uses and ease of installation of this system and see our Shows You How booklet No. 24 Operating Points and Signals.